Sweet little lamp H.K Aro & Knit.
Stamped HKA11. HKA is H K Aro & Knit, a lighting company from Helsinki, Finland. The company no longer exists.

This lamp is often awarded to HKA Helsingin Kaasuvalo
It seems HKA Helsingin Kaasuvalo is not a lighting company, but a company from Finland that produced cast iron counterweights, switches and gas lighting. In 1967 the company reorganised and became Kaasuvalo Oy.